If you haven't booked your tickets already, and if you don't HAVE to reach by 6th afternoon at any cost, I would suggest you take the 22694 SBC Rajdhani instead. Slightly better timings(departure at 20:50, arrival at 18:50, thus you dont waste 2 (half-)days); More comfortable and cleaner LHB coaches(as against old ICF rakes of Secunderabad Rajdhani); I just checked the availability: RSWL 4 for 2A on 5th January, which should get confirmed.